Drill bit Tvardy HSS for metal, black-gold coating, 15.00 mm

Tvardy HSS drill bit for metal with black-gold coating, diameter 15.00 mm, is designed for drilling holes in steel and other metals. Manufactured from high-speed steel, the bit offers the hardness and heat resistance required for metalworking operations. Its black-gold surface treatment reduces friction and improves chip evacuation compared with plain HSS finishes. The drill is suitable for use in handheld drills and drill presses used in maintenance, fabrication and general metalworking tasks.

Advantages

The HSS material provides wear resistance and maintains cutting performance at elevated temperatures encountered during metal drilling. The black-gold coating decreases friction between the drill and workpiece, which helps reduce heat buildup and prolongs tool life. A precisely ground tip ensures accurate centring and consistent hole diameters, while the 15.00 mm diameter is suitable for medium-size hole requirements in a variety of metalworking contexts.

Suitable for

• Drilling holes in mild and alloy steels
• Use with drill presses and handheld electric drills
• Maintenance, repair and fabrication tasks in workshops
• Preparing clearance or pilot holes for bolts and fasteners

Key specifications

• Material: high-speed steel (HSS)
• Coating: black-gold surface treatment for reduced friction
• Diameter: 15.00 mm
• Tip type: ground tip for accurate centring
• Typical applications: metal drilling, fabrication and maintenance

How to use

Secure the workpiece and select an appropriate chuck or collet to hold the 15.00 mm drill bit firmly. Use a suitable drill speed for HSS bits and the specific metal being drilled—lower speeds for harder steels and higher speeds for softer metals. Apply steady feed pressure and allow the bit to cut without excessive force. Periodically clear chips from the hole and, when necessary, use cutting fluid to improve cooling and lubrication for longer tool life and better hole finish.

Usage recommendations

For best results, clamp the workpiece to prevent movement, pre-drill pilot holes when drilling very thick or hard materials, and use appropriate cutting fluid or coolant to reduce heat. Inspect the bit for wear before use and replace when tip geometry is degraded.